Andrew operation and maintenance Specifications download pdf (Page 12)

Chapter 1 - General Information

42S315F 1-6

1.3 Reflector Description

The reflector, in combination with its shaped subreflector and feed system, is

optically designed to yield high efficiency. The reflector consists of

48 precision stretch-formed aluminum panels. The panels are bolted together

in the field to form a surface of revolution.

Each reflector assembly consists of a central hub assembly, to which are

attached the radial trusses, intercostals, and the reflector panels. Ample space

is provided inside the hub for mounting of redundant low-noise amplifiers

(LNAs) and switching equipment. The hub has an access cover on the rear

surface for convenient service and inspection of the feed electronics. Each

reflector panel is aligned independently to ensure accuracy. The radial

trusses support the panels and are locked together using the intercoastals.

The hub assembly includes a machined plate for attaching the inner row of

panels. All the panels are stretch-formed and have rigid back structures that

are riveted into place.

The reflector panels are finished with a high reflectance white paint applied

over a chromate conversion coating. (Other colors are available as options.)

This special paint diffuses solar radiation to minimize subreflector heating

from the reflector. The remainder of the equipment is primed and painted

with two coats of gloss enamel.

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Andrew operation and maintenance Specifications Page 12